ATA inhibits NA enzymatic activity.

<p>ATA inhibits enzymatic activity of NA (A) derived from PR8, NC, NY and B viruses, (B) recombinant N1 and N4 proteins. Viruses or recombinant proteins were incubated with increasing concentrations of ATA and NA enzymatic activity was determined by a chemiluminescent assay. Samples were tested in quadruplicates and presented as means and standard deviations (error bars).